Pump



1 'P. MAILLEBUAU 1,340,966

PUMP

Filed July 25, 1930 &

2 W I T 2 1 g '2 PIEYIB MAN-LE BUM] mvEN'roR;

in} Attorney.

Patented Jan. 12, 1932 UNITED STATES PATENT OFFICE PUMP Application filed July 25, 1980,,Se1-la1 No. 470,555, and in France September 24, 1929.

The present invention relates to a pump of the suction and discharge type for elevating water and other liquids.

Known pumps have been devised in which 5 the piston operates under hydraulic control,

which latter comprise pipes of small diameter by which the body of the pump is supplied with the fiuid under pressure. If the water is to be elevated to a great height, thus requiring a great pressure, the packing of the pump is 'su ject to avery rapid wear, and the pipes will often burst.

The pump, the object of the present invention, obviates all such defects, and it is essentially characterized by the fact that it consists of two pipes for the ascent of the liquid, each comprising a main pump body or barrel provided with a piston, the same being connected together at the lower part after the manner of communicating vessels; the hydraulic control of the piston contained in one of the vertical pipes being effected by the column of liquid in the other pipe, and inversely.

The following description, together with the accompanying drawings, will show the manner in whichthe invention may be carried into effect.

' Fig. 1 is a diagrammatic view of the pump. Fig. 2 is a section, on a larger scale, ofthe controlling. piston.

As will be observed in the figures, the pump, the object of the invention comprises two ascending pipes a a which are connected together at the lower part. The two pipes are provided with similar parts, which will be enumerated for the pipe a At the upper part is a controlling piston 0 which is actuated in the known manner by a crankshaft d or by any other means. At the lower part are disposed two pistons 6 f which are mounted on the same rod. Thepiston 6 receives the thrust of the piston 0 The piston f is the pump piston properly so called. A branch pipe 9 is mounted on the respective sides of the stroke of the piston e and it is immersed at k in the water of the well; clack-valves 6 7 are disposed "in said branch 9. At the upper part of the ascendingpipe, and at the upper end of the stroke of the piston c is branched a pipe 70 provided with a clack valve Z and serving for the evacuation of the pumped water.

The piston 0 or the piston c which is identical, is shown on a larger scale in Figure 2. This piston is constituted as a delivery valve in such manner as to be traversed by the water during its upward stroke. The rod m carries an axle n 011 which is slidable the head 0 of the piston properly so called; it being fitted with a packing member p held by a disk 9. During the down stroke, the head 0 is applied against the circular packing member m of the rod m, and the piston operates normally for the compression of the water situated below it. During the up stroke, the rod m rises, and the head 0 slides and comes into the shown position of the figure; a spring 7" aids in this'motion, and the water situated below the piston proceeds freely in the direction of the arrows and thus attains the discharge pipe A washer s screwed to the rod 12,- and a packing member limit the sliding of the head 0.

The piston 0, might be designed as an ordi- 75 nary piston, but in this case, a special clack valve under positive control will be substituted for the ordinary clack valve Z of the pipe is which leads to the lower part of the stroke of the piston 0 The"lower pistons 7, f are connected together by a rocking device by which they will maintain their respective positions in the pipes (1 a in spite of the leakage which may result from the Wear of said pistons. A link u 1& is pivoted to the lower part of the respective pistons f f and the lower ends of said linksare pivoted to the respective ends of a rocking lever 4) which is pivotally mounted on a stationary axle. The said lever and links are very light, and are subjected to no strains, as the pressure is imparted by the liquid contained in the connecting pipe 6.

The operation of the pump is as follows: The water is supposed to fill the two pipes a a and also the pipe 1) connecting them together, and when the piston cidescends,

(in the case of the figure) the erates as a hydraulic control column a? opfor the piston 7'. Thepiston 7, when descending, causes the latter in its downward movement draws the suction of the water in the pipe h whilst liqtuid in its wake past the inlet valve into the the pressure imparted by b to the piston f T- ranch.

effects, in the direction of the arrrow, the dis- In testimony whereof I atix m signature. 5 charge of the water situated above the piston PIERRE MAILL BUAU. v 7 f and contained inthe chamber M. The p A water proceeds through the valve 2' into the pipe a whence it traverses the iston c in order to reach the oiftake pipe During 10 the next half revolution of the crank-shaft, 7

' the function is inverted,.and so on.

It is observed, that in addition to the advantages specified,the arrangement'ot communicating vessels provides at each instant for the equilibrium of the'column'of water 34 contained in oneof the pipes by the column of water situated in the other ipe. Obviously, modifications in etail maybe employed, without departing from the. prin- 2o ciple of the present invention. I p

' What I claim is:

1. In a liquid pump of the character de-- scribed, the combination of two upright pipes connected together at their lower ends a piston operating in the upper portion 0 each pipe, means in the construction of each piston to permit liquid to ass through during each descending stro e, means actuating said pistons to alternately displace the column of liquid in said pipes, two istons di osed in the lower portion of eac ipe an operating with the displacement o the column of water in they other pipe separate pipes in communicaton with the first pipes I and provided with inlet and outlet valves to I control liquid pumped by the lower members of the lower pistons. 1

2. A pump, as claimed in claim 1, including means connecting the lower pistons to- 4o gether to insure alternate movement thereof. 1

.3. Ina liquid pump of the character described, the combination of a U-shaped pipe having a T-branch pipe for each upright arm, a pipe continuing from the upper end of the cross piece oi each T-branch and in com- 1 munication with the upright arm at a point spaced above the connection to the T-branch ipe, an inlet and an outlet valve for the ower and upper ends respectively of the cross pieceof each T-branch pipe, two pistons 1 in each upright arm operating respectively above and below the connection with the branch, means connecting the two pistons in one arm with the two pistons 'of the other arm to cause opposite reciprocating move- 11 ment in one set of pistons Wlth respect to the movement in the other set, and a reciprocatl, mg valve piston in the upper portion of each upright arm and operatang above the pipe M connection between the ranch and arm, I 1:

. wherebythe' column of liquid ineach arm between the upper piston and the upper member of the lower istons imparts the downward movement 0 the upper piston to V 6 the lower pistons, while the lower member of I: 

